30/61
ESI Outdoor Unit Installation Instruction
05.2018
Manufacturer reserves the right to change at any time for specifications or designs without notice and incurring obligations.
Error Code
Description
Legend
P1
High pressure protection
E1
System locks up when P1 has occurred six times in 3 hours.
Cannot restart *1
P2
Low pressure protection in cooling mode
E2
System locks up when P2 has occurred six times within 3 hours.
Cannot restart *1
P3
Discharge temperature (TD) protection
E3
System locks up when P3 has occurred six times within 3 hours.
Cannot restart *1
P4
Discharge temperature (TD) sensor is disconnected or damaged
P5
Module temperature (TF) protection
E5
System locks up when P5 has occurred six times within 3 hours.
Cannot restart *1
P6
Over-current protection for compressor
E6
System locks up when P6 has occurred six times within 3 hours.
Cannot restart *1
P7
Liquid slugging protection
E7
System locks up when P7 has occurred three times within 5 hours.
Cannot restart *1
P8
Low compressor voltage protection
Cannot restart *1
E8
System locks up when P8 has occurred three times within 60 minutes.
Cannot restart *1
PA
DC fan motor over-load protection
F1
Ambient temperature sensor fault (TA)
Backup running*2
F2
Suction temperature sensor fault (TS)
Backup running*2
F3
Liquid temperature sensor fault (TL)
Backup running*2
F4
Condenser coil temperature sensor fault (TH)
Backup running*2
F5
Discharge temperature sensor fault (TD)
Backup running*2
F6
Module temperature sensor fault (TF)
Backup running*2
F7
High pressure sensor fault (HP)
Backup running*2
F8
Low pressure sensor fault (LP)
Backup running*2
E4
Communication fault between main chip and INV drive chip
Cannot restart *1
H1
Ambient temperature limit operation in cooling mode
H2
Ambient temperature limit operation in heating mode
H3
Abnormal switch alarm for 4-way valve
Just show alarm
H4
Condenser coil temperature sensor is disconnected or damaged
H5
EEPROM fault
H6
Low voltage alarm
C0-C9
Compressor INV module protection
E0
System locks up when C0~C8 has occurred six times within 60 minutes.
Cannot restart *1
Past error codes can be spot checked from default mode by BS1~BS3 buttons, and seen from Ecoer
Smart Service App.
Illustration
1. On the case there is an “E” code, turn off the power supply for 5 minutes and turn on again can call the
system back.
2. System goes to backup running under sensors fault varies from 7 to 180 days. Allow up to two sensors
backup running at the same time.
15.1 Error code List for Outdoor Unit